diff --git a/radio/1.1/ISap.hal b/radio/1.1/ISap.hal
index edcf176..0cabccc 100644
--- a/radio/1.1/ISap.hal
+++ b/radio/1.1/ISap.hal
@@ -18,8 +18,7 @@
 
 import @1.0::ISap;
 
-interface ISap extends @1.0::ISap {
-    /**
-     * Empty top level interface.
-     */
-};
+/**
+ * Empty top level interface.
+ */
+interface ISap extends @1.0::ISap {};
diff --git a/radio/1.2/ISap.hal b/radio/1.2/ISap.hal
index 757027c..65f9b84 100644
--- a/radio/1.2/ISap.hal
+++ b/radio/1.2/ISap.hal
@@ -18,8 +18,7 @@
 
 import @1.1::ISap;
 
-interface ISap extends @1.1::ISap {
-    /**
-     * Empty top level interface.
-     */
-};
+/**
+ * Empty top level interface.
+ */
+interface ISap extends @1.1::ISap {};